Hello,
We have some fiber conections between Procurve switchs. The transceivers are J4859C: http://h30094.www3.hp.com/product/sku/3673146
The fiber between switchs are multi mode OM1 (62.5/125). In the transceiver information web says that it works in both multi and single mode with 1310nm laser wave length. This is the transceiver information in the switchs:
# show interfaces transceiver detail
Transceiver in 25
Interface Index : 25
Type : 1000LX
Model : J4859C
Connector Type : LC
Wavelength : 1310nm
Transfer Distance : 4.0km (9um),
Diagnostic Support : None
Serial Number : XXXXXXXXXX
The multi mode fiber theory says that it only works in 850nm or 1300nm, not in 1310nm wave lenght. 1310nm is for single mode.
So, this is my questions?
1. Is it possible to chanhe the wave lenght of the transceiver laser? If not, is it normal to use 1310nm in multi mode fiber?
2. What about the "Transfer Distance"? What does it means the "4.0km (9um)"? 9um is normally asigned to single mode fiber.
We installed 3 fiber connection, in one of them we have CRC errors:
# show logging -r
Keys: W=Warning I=Information
M=Major D=Debug E=Error
---- Reverse event Log listing: Events Since Boot ----
W 01/21/15 11:12:42 00329 FFI: port 25-Excessive CRC/alignment errors. See help.
W 01/21/15 11:09:17 00329 FFI: port 25-Excessive CRC/alignment errors. See help.
Could we change the transceivers to work in a multi mode fiber?
I will appreciate any help.
Kind regards.
#fiber#ProCurve#transceiver